简便计算 0.32*12.5 4.5*1.02 7 - 知识问答

简便计算 0.32*12.5 4.5*1.02 73.6*0.99

1个回答

0.32*12.5=0.8*12.5*0.4
=10*0.4
=4
4.5*1.02=4.5*1+4.5*0.02
=4.5+0.09
=4.59
73.6*0.99=73.6*1-73.6*0.01
=73.6-0.736
=72.864

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